Mountable universal holder



FIG. 1 is a front elevational view of a mountable universal holdershowing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a top, front, and right side perspective view thereof.

The broken-line disclosure of screws and wall fragments in the views isfor illustrative purposes only and forms no part of the claimed design.

The ornamental design for a mountable universal holder, as shown anddescribed.